package cn.tedu;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Scanner;

public class Demo11 {
    public static void main(String[] args) throws SQLException {
        Scanner scanner=new Scanner(System.in);
        System.out.println("输入用户名");
        String username=scanner.nextLine();
        System.out.println("输入密码");
        String password=scanner.nextLine();
        try (Connection conn = DBUtils.getConn()) {
            String sql="select password from user where username=?";
            PreparedStatement ps=conn.prepareStatement(sql);
            ps.setString(1,username);
            ResultSet rs=ps.executeQuery();
            if(rs.next()){
                String pw=rs.getString(1);
                if(pw.equals(password)){
                    System.out.println("登陆成功!");
                }else {
                    System.out.println("密码错误");
                }
            }else{
                System.out.println("用户名不存在");
            }
        }catch (SQLException throwables){
            throwables.printStackTrace();
        }
        System.out.println("执行完毕");
    }
}
